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All Journal Majalah Ilmiah Pengkajian Industri Wave: Jurnal Ilmiah Teknologi Maritim
Puryantini, Navik
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Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Engineering Industrial & Manufacturing Engineering Transportation

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Design Aspects of Positional Mooring System Based on LR FOIFL Rules Prasetyawan, Ika; Puryantini, Navik
Wave: Jurnal Ilmiah Teknologi Maritim Vol 6, No 1 (2012)
Publisher : Wave: Jurnal Ilmiah Teknologi Maritim

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (182.913 KB) | DOI: 10.29122/jurnalwave.v6i1.3325

Abstract

Floating offshore units, such as FPSOs, are subject to dynamic excitations from the environment and require to be moored to maintain position at the fix location of operation. In designing positional mooring systems for floating offshore units, systematic analyses must be performed to predict tension levels in the mooring lines and offsets of the floating unit under extreme and ambient service conditions, in order to ensure the mooring arrangement provides a level of safety acceptable to the industry. In order to derive environmental loads pertinent to the location of operation, environmental data should be made available comprising of long and short term current, wind and wave characteristic data specific to the site of operation. Based on LR FOIFL Rules, the performance of positional mooring systems is assessed on the basis of sets of site specific extreme and ambient (or fatigue) environmental conditions. Class rules require consideration of extreme conditions with recurrence period of 100 years (e.g. combination of 100 year waves + 100 year wind + 10 year current).In the process of designing positional mooring systems of FPSOs, designers may start from quasi-static analysis at preliminary design stage, and then investigate various combinations of extreme conditions in the dynamic analysis for a more rigorous approach during the final design stage.The outcomes of the analyses have to be compared against industry standards such as the LR FOIFL rules to confirm the positional mooring system?s design meets levels of safety recognised as acceptable to the industry. In this paper, an introduction to positional mooring systems for FPSOs, considering typical strength aspects is given, followed by a general description of hydrodynamic characteristics of ship shape FPSOs The design aspects of mooring system is then given in section outlining methodology in mooring analysis using either quasi-static or dynamic method. 
KAJIAN EKSPERIMENTAL PELUNCURAN KAPAL MENGGUNAKAN AIR BAG Irawanto, Zulis; Puryantini, Navik; Ali, Baharudin; Prasodjo, Budi Setyo
Majalah Ilmiah Pengkajian Industri Vol. 13 No. 1 (2019): Majalah Ilmiah Pengkajian Industri
Publisher : Deputi TIRBR-BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (646.877 KB) | DOI: 10.29122/mipi.v13i1.3243

Abstract

Sampai saat ini penelitian tentang peluncuran kapal menggunakan airbag masih kurang, sehingga informasi ilmiah tentang hal tersebut sangat minim. Beberapa kendala yang ada dalam praktek lapangan antara lain  kesulitan memprediksi perilaku kapal saat diluncurkan dengan airbag, kesulitan menginvestigasi kondisi-kondisi kritis peluncuran kapal serta belum tersedia petunjuk operasional keselamatannya. Penelitian ini mengkaji peluncuran kapal menggunakan airbag dengan menggunakan metode uji model dengan melakukan studi sensitivitas beberapa parameter yang berpengaruh pada peluncuran kapal.  Analisis dilakukan pada beberapa kondisi ekstrim yaitu kondisi terjadinya benturan, kondisi pada sudut pitch maksimum, dan kondisi pada freeboard minimum. Melalui uji model,  dapat diketahui perilaku gerakan kapal saat diluncurkan dengan menggunakan airbag, serta dapat diketahui tingkat keselamatan peluncuran kapal
DESIGN ASPECTS OF POSITIONAL MOORING SYSTEM BASED ON LR FOIFL RULES Prasetyawan, Ika; Puryantini, Navik
Wave: Jurnal Ilmiah Teknologi Maritim Vol 6, No 1 (2012)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (182.913 KB) | DOI: 10.29122/jurnalwave.v6i1.3325

Abstract

Floating offshore units, such as FPSOs, are subject to dynamic excitations from the environment and require to be moored to maintain position at the fix location of operation. In designing positional mooring systems for floating offshore units, systematic analyses must be performed to predict tension levels in the mooring lines and offsets of the floating unit under extreme and ambient service conditions, in order to ensure the mooring arrangement provides a level of safety acceptable to the industry. In order to derive environmental loads pertinent to the location of operation, environmental data should be made available comprising of long and short term current, wind and wave characteristic data specific to the site of operation. Based on LR FOIFL Rules, the performance of positional mooring systems is assessed on the basis of sets of site specific extreme and ambient (or fatigue) environmental conditions. Class rules require consideration of extreme conditions with recurrence period of 100 years (e.g. combination of 100 year waves + 100 year wind + 10 year current).In the process of designing positional mooring systems of FPSOs, designers may start from quasi-static analysis at preliminary design stage, and then investigate various combinations of extreme conditions in the dynamic analysis for a more rigorous approach during the final design stage.The outcomes of the analyses have to be compared against industry standards such as the LR FOIFL rules to confirm the positional mooring system?s design meets levels of safety recognised as acceptable to the industry. In this paper, an introduction to positional mooring systems for FPSOs, considering typical strength aspects is given, followed by a general description of hydrodynamic characteristics of ship shape FPSOs The design aspects of mooring system is then given in section outlining methodology in mooring analysis using either quasi-static or dynamic method. 
DESIGN AND ANALYSIS OF CAVITATION ON 22 M SUBMARINE PROPELLERS Indiaryanto, Mahendra; Setyanto, Taufiq Arif; Puryantini, Navik; Asrowibowo, Nurwidhi
Majalah Ilmiah Pengkajian Industri Vol. 14 No. 2 (2020): Majalah Ilmiah Pengkajian Industri
Publisher : Deputi TIRBR-BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v14i2.4208

Abstract

Many methods approach in designing a propeller for a 22 m submarine, which is based on the literature of propeller design that has been widely publicized, specifically the type B-series propeller. From the B-series propeller design, it can be known that the performance diagram in the form of the propeller coefficient is finally correlated with the 22m submarine resistance value that has been tested at BTH-BPPT. This study's objective is to produce a propeller design with good hydrodynamic aspects, especially propeller with high efficiency and cavitation phenomena that do not occur on the propeller. The implementation of this research can be done by modification on the skew angle on the B-series propeller. It is expected to choose the right B-series propeller and skew angle propeller modification, capable of providing high-efficiency values and loss of cavitation in the leaf area of the propeller. The production of propeller models is needed for conducting an open water test in the Towing Tank and the cavitation test in the cavitation tunnel at the Hydrodynamics Technology Center for the Agency for Assessment and Application of Technology (BTH – BPPT).Key Word: Design; Propeller; Cavitation
Co-Authors A., Rofikotul Ali, Baharudin Asrowibowo, Nurwidhi Bambang Tjahjadi Indiaryanto, Mahendra Irawanto, Zulis Prasetyawan, Ika Prasodjo, Budi Setyo Setyanto, Taufiq Arif Shinta P., Dian